Gmoccapy sim broken in ISO

Hi,

I was test driving LInuxCNC with an ISO:

www.linuxcnc.org/testing-stretch-rtpreempt/

I was only able to get the second boot choice to work, so I could only test with it. But when I tried to run the Gmoccappy sim, I got a complaint about a missing gst module from within some python module that seems to want to play sounds.

It's a shame because Gmoccapy would be part of my decision making process in choosing LInuxCNC over UCCNC.

- Andy

forum.linuxcnc.org/gmoccapy/33637-gmocca...live-cd-installation

This was fixed last year
github.com/LinuxCNC/linuxcnc/issues/297
The dependency is not available in stretch